*{
  margin: 0;
  padding: 0; 
  box-sizing: border-box;
}
#app {
  width: 100%;
  height: 100%;
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
}
li{
  list-style: none;
}

  a {
    text-decoration: none;
    color: #333;
    outline: none;
}